Testing

Testing with python-trezor

Apart from the internal tests, Trezor core has a suite of integration tests in the python-trezor library. There are several ways to use that.

pipenv is a tool for making reproducible Python environments. Install it with:

sudo pip3 install pipenv

Inside trezor-core checkout, install the environment:

pipenv install

And run the automated tests:

pipenv run make test_emu

You will need a separate checkout of python-trezor. It's probably a good idea to do this outside the trezor-core directory:

git clone https://github.com/trezor/python-trezor

Prepare a virtual environment with all the requirements, and switch into it. Again, it's easiest to do this with pipenv:

cd python-trezor
pipenv install -r requirements-dev.txt
pipenv install -e .
pipenv shell

Alternately, if you have an existing virtualenv, you can install python-trezor in "develop" mode:

python setup.py develop

If you want to test against the emulator, run it in a separate terminal from the trezor-core checkout directory:

PYOPT=0 ./emu.sh

Find the device address and export it as an environment variable. For the emulator, this is:

export TREZOR_PATH="udp:127.0.0.1:21324"

(You can find other devices with trezorctl list.)

Now you can run the test suite, either from python-trezor or trezor-core root directory:

pytest

Or from anywhere else:

pytest --pyargs trezorlib.tests.device_tests  # this works from other locations

You can place your own tests in trezorlib/tests/device_tests. See test style guide (TODO).

If you only want to run a particular test, pick it with -k <keyword> or -m <marker>:

pytest -k nem      # only runs tests that have "nem" in the name
pytest -m stellar  # only runs tests marked with @pytest.mark.stellar

If you want to see debugging information and protocol dumps, run with -v.

When you're happy with your tests, follow these steps:

Mark each of your tests with the name of your feature. E.g., @pytest.mark.ultracoin2000.
Also mark each of your tests with @pytest.mark.xfail. That means that the test is expected to fail. If you want to run that test as usual, run pytest --runxfail
Submit a PR to python-trezor, containing these tests.
Edit the file trezor-core/pytest.ini, and add your marker to the run_xfail item:
```
run_xfail = lisk nem ultracoin2000
```
This will cause your PR to re-enable the xfailed tests. That way we will see whether your feature actually implements what it claims.
Submit a PR to trezor-core.
Optionally, if you like to be extra nice: after both your PRs are accepted, submit a new one to python-trezor that removes the xfail markers, and one to trezor-core that removes the run_xfail entry.